Volvo Penta D6 370 Leak off test

[Rangerman]

Hi all,
My D6 (580 Hrs) some times runs a bit lumpy and be it rarely, can be a pig to start but always has. Ive done the usual stuff like change the filters and checked for any water in the fuel and all seems good, when it happens no faults are shown on the EVC. I ran a leak off test on the injectors for 3 mins and the results are shown in the picture attached. Unfortunately i have no data to tell me what volume over a period of time constitutes good or bad results, Are there any gurus out there who can tell me what volumes/time i should be expecting?

 

[lynallbel]

Common rail?
If so it is normally one duff injector that will not allow the rail to reach start pressure.
My experience is all based on road vehicles, but I cannot see it making much if any difference.
Many road vehicles you can check the injector balance at idle to see which are the weak ones.